RE: READC - OS400 issues?

["Leland, David" <dleland@xxxxxxxxxx>]

Now that is cool!  Never ceases to amaze me what you can learn on this list.

Dave

-----Original Message-----
From: Paul Tuohy [mailto:tuohyp@xxxxxxxxxxxxx]
Sent: Monday, June 30, 2003 1:22 PM
To: Midrange Systems Technical Discussion
Subject: Re: READC - OS400 issues?


No kidding - it really works :-).

Paul
----- Original Message -----
From: "Leland, David" <dleland@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'" <midrange-l@xxxxxxxxxxxx>
Sent: Monday, June 30, 2003 7:08 PM
Subject: RE: READC - OS400 issues?


> No kidding - does that really work?  When I need to read a subfile twice
in
> succession, I usually do the READC for the first loop and then a CHAIN for
> the second, incrementing the subfile pointer until I run out of records.
If
> your method works, that would be a much better way.
>
> Dave
>
> -----Original Message-----
> From: Paul Tuohy [mailto:tuohyp@xxxxxxxxxxxxx]
> Sent: Monday, June 30, 2003 12:45 PM
> To: Midrange Systems Technical Discussion
> Subject: Re: READC - OS400 issues?
>
>
> Hi Rick,
>
> Before the second read of the subfile, set the RRN field for the subfile
(as
> declared on the SFILE on the F spec) to 1 - it is the eqivalent of SETLL.
>
> HTH
>
> Paul Tuohy
>
> ----- Original Message -----
> From: "Rick Rayburn" <the400man@xxxxxxxxxxx>
> To: <midrange-l@xxxxxxxxxxxx>
> Sent: Monday, June 30, 2003 3:42 PM
> Subject: READC - OS400 issues?
>
>
> > ...using READC and SFLNXTCHG to process SFL entries.
> >
> > ...validate routine comes first, use READC, update SFLNXTCHG, finish
READC
> > loop.
> >
> > ...if user presses update function key, code falls through and tries to
> > READC through SFL again to process only records changed for update.
> >
> > Problem: second READC loop appears to already be at EOF when starting
new
> > READ's (from previous loop?). No records processed, EOF reached
> immediately.
> > I know with physical files, we can *LOVAL them back to the beginning and
> > read them all over again.
> >
> > Question: Does OS400 support 2 READC accesses within same coding loop
> (only
> > 1 EXFMT taken originally)? Is there any way to do this by using READC?
> There
> > are multiple other methods to handle the updates but I am only
interested
> in
> > using 2 READC loops upon one function key depression.
> >
> > Thanx for the time.
> >
> > Rick Rayburn
> >
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